Shortcodes: Reverse wrapping of apply_shortcodes() and do_shortcode().

This changeset reverses the wrapping of `apply_shortcodes()` and `do_shortcode()` such that `apply_shortcodes()` is now the recommended function. In addition:

- Calls to `do_shortcode()` have been changed to `apply_shortcodes()`.
- Some default filter callbacks have been changed from `'do_shortcode'` to `'apply_shortcodes'`.
- Applicable documentation has been updated to refer to `apply_shortcodes()` instead.

Follow-up to [47004].

Props SergeyBiryukov, rafiahmedd, namithjawahar, peterwilsoncc, costdev.
Fixes #55883.

Built from https://develop.svn.wordpress.org/trunk@54248


git-svn-id: http://core.svn.wordpress.org/trunk@53807 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/block-template.php

@@ -242,7 +242,7 @@ function get_the_block_template_html() {
 	$content = convert_smilies( $content );
 	$content = shortcode_unautop( $content );
 	$content = wp_filter_content_tags( $content );
-	$content = do_shortcode( $content );
+	$content = apply_shortcodes( $content );
 	$content = str_replace( ']]>', ']]>', $content );
 
 	// Wrap block template in .wp-site-blocks to allow for specific descendant styles